For sure several of these parts are going into the spares category including the new bearings and impeller and cover plate. That shaft though is not one of them, nor is the pump body itself. I will eventually buy a new shaft for a spare along with the cover gasket. I may take the pump body to the dealer for their opinion of its condition. They have been very informative and helpful so far. It would be nice to have the complete assembly ready the day you need it. I suspect that the new pump won't be needing more than new impellers for some years to come. If the old pump was original it really has had a long and successful life. I'm ok with a dealer making some money off me once in a while. It was also good to know you could actually get this same pump. I am also really happy this pump didn't croak when I was bringing the boat down the river. That would have gotten really expensive fast.

While I was in the Yanmar dealer's shop I did give a quick glance at what a new equivalent Yanmar replacement would cost. I was very happy to only be buying the expensive water pump after seeing that number and it will motivate me to get on with some of these other projects. Next winter I think I will follow your steps with the top end of the engine and transmission. I have no idea how many hours are on this engine, but it seems to be pretty strong and worth the effort to make it go a bunch more years.

Dave Graf